Bad experience with iTunes
I plugged my iPod into the PC for the first time since installing iTunes 7.3, and I get this:
So I hit OK, click "Restore", and it resets my iPod to factory defaults. The iPod reboots, and when it re-connects to iTunes, I get the same dialog.
Now what? I can't get any music on my iPod. :(
Update: Turns out it was a drive letter conflict, not iTunes 7.3. This article describes the problem, and this article has the solution.